Granted Patent
Utility
US 6,455,000 · App. 09/350,929
Method and apparatus for measuring the concentration of a gas
Inventors:
Wayne Ernest Conrad, Helmut Gerhard Conrad, Ted Szylowiec
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Jul 12, 1999
Inventors
Wayne Ernest Conrad
Helmut Gerhard Conrad
Ted Szylowiec
Assignee (at issue)
Fantom Technologies Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.